as in treacherous
formal
causing harm in a way that is gradual or not easily noticed
Most people with this insidious disease have no idea that they are infected. an insidious enemy
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of insidious
But also implicit in this genre of social media content, some critics and observers say, are more insidious messages — ones that distort our perceptions of masculinity.
—
Harmeet Kaur, CNN Money, 29 Mar. 2025
My desire to stave off the panic had become more insidious.
—Cristina Tudino, Vogue, 21 Mar. 2025
My desire to stave off the panic had become more insidious.
—Cristina Tudino, Vogue, 21 Mar. 2025
If the other AGIs take the bait, the insidious AGI stands tall as the best, assuming nobody finds out the underhanded gambit at play.
—Lance Eliot, Forbes, 21 Mar. 2025
See All Example Sentences for insidious
Harmeet Kaur, CNN Money, 29 Mar. 2025
My desire to stave off the panic had become more insidious.
—Cristina Tudino, Vogue, 21 Mar. 2025
My desire to stave off the panic had become more insidious.
—Cristina Tudino, Vogue, 21 Mar. 2025
If the other AGIs take the bait, the insidious AGI stands tall as the best, assuming nobody finds out the underhanded gambit at play.
—Lance Eliot, Forbes, 21 Mar. 2025
See All Example Sentences for insidious
Recent Examples of Synonyms for insidious
Adjective
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The match ended when Heyman turned on both Punk and Reigns with a pair of treacherous low blows on each.—
Alfred Konuwa,
Forbes.com,
20 Apr. 2025
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In February, Star residents and City Council members clashed over competing needs for a new school and improvements to a treacherous road, with the school proposal winning out.—
Rose Evans,
Idaho Statesman,
16 Apr. 2025
Adjective
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Shannon Riley, founder and CEO of Building 180 – an art production and consulting agency that arranged the installation – told USA TODAY battery and funding reasons limit the subtle chest motions that mimic breathing to an hour a day, from 5-6 p.m.—
Jorge L. Ortiz,
USA Today,
18 Apr. 2025
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Here, the power lies in subtle luxury—heritage made tangible.—
Kate Hardcastle,
Forbes.com,
18 Apr. 2025
Adjective
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Last year’s 17-9 start proved to be a false spring, one that lulled fans into thinking Craig Counsell replacing David Ross was the real difference between an 83-win Cubs team and the postseason.—
Paul Sullivan,
Chicago Tribune,
25 Apr. 2025
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Trump’s false assertions about the outcome of the 2020 election ultimately led a crowd of supporters to storm the Capitol on Jan. 6, 2021, temporarily disrupting the certification of Biden’s win.—
Elizabeth Crisp,
The Hill,
23 Apr. 2025
Adjective
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Without resources or expertise to vet influencers properly, these companies become vulnerable to deceptive practices.—
Matthew Kayser,
USA Today,
27 Apr. 2025
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In 2022, the California DMV sued Tesla, saying the company engaged in deceptive marketing and advertising practices around its Autopilot and Full Self-Driving systems.—
Lora Kolodny,
CNBC,
25 Apr. 2025
Adjective
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Jake Gyllenhaal is his foil as the perfidious Iago, who goads Othello into unreasoning jealousy with lies about his beloved Desdemona (Molly Osborne).—
New York Times,
New York Times,
17 Feb. 2025
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Since then, Putin has sought instead to rally the public to the defense of a motherland besieged by the perfidious and cunning West.—
Leon Aron,
The Atlantic,
5 Dec. 2024
Adjective
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Many patients walk away with incorrect prescriptions.—
Kaitlyn Gomez,
USA Today,
27 Apr. 2025
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If a player guesses incorrect groups of words four times, the game ends, and they are defeated.—
Thomas G. Moukawsher,
MSNBC Newsweek,
27 Apr. 2025
Adjective
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But even one in three Republicans said their cost of living was on the wrong track, according to the poll, which surveyed 4,306 U.S. adults nationwide between April 16 and April 21.—
Jason Lange,
USA Today,
25 Apr. 2025
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Department of Justice lawyers accidentally sent the wrong letter to a judge, admitting weaknesses in their case against New York City’s congestion pricing.—
Brady Knox,
The Washington Examiner,
24 Apr. 2025
Cite this Entry
“Insidious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insidious. Accessed 3 May. 2025.
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